Solid seal pole column for vacuum circuit breaker EEP1-12/1250-31.5
Model No: EEP1-12/1250-31.5
solid seal pole column has the following advantages
1.the traditional packaged very column, compared to solid seal pole column part number a large number of reducing, conductor lap surface by six group reduced to 3 groups, connecting bolt by eight reduced to 1 ~ 3, (see chart 7) simple structure greatly improved the reliability of the circuit breaker.
2.Due to the vacuum arc extinguish chamber was embedded into solid material, so don’t need to do any further processing, solid seal pole column can achieve a high dielectric strength; Vacuum arcing chamber was embedded into solid materials, extremely column external environment on vacuum arcing chamber’s influence was reduced to the least.
Parameters of solid seal pole column
MAIN TECHNICAL SPECIFICATION UNIT SPECIFICATION 1250 Rated voltage kV 12 Rated current A 1250 Rated frequency Hz 50/60 Short-duration（1min） power frequency withstand voltage kV 48 Lightning impulse withstand voltage kV 95 Rated short-circuit breaking current kA 31.5 Rated peak withstand current kA 80 Rated short-circuit making current kA 80 Rated short-time withstand current kA 31.5 Rated duration of short-circuit S 4 Rated breaking current of single capacitor bank A 400 Rated breaking current of back to back capacitor bank A 400 Rated operating sequence o-0.3S-co180S-co Breaking operations of rated short circuit breaking current Time 30 Mechanical endurance Time 30000 Contact self-close force N 140±50 Force required to hold contacts open at full stroke N 220±50 Circuit resistance at lower limit of rated contact force mΩ ≤ 25 Contact limit erosion mm 3 Gas pressure inside vacuum interrupter Pa ≤ 1X10-3 Partial discharge Pc ≤ 5 Weight of moving parts Kg Weight of vacuum interrupter embedded poles Kg
Mechanical data required for the matched vacuum switchgear
MAIN TECHNICAL SPECIFICATION UNIT SPECIFICATION 1250 Clearance between open contacts mm 9±1 Average opening speed m/s 1.2±0.2 Average closing speed m/s 0.6±0.2 Rated contact pressure N 3100±200 Contact bouncing duration at closing operation ms ≤ 2 Out of simultaneity of contact closing and opening ms ≤ 2 Bouncing back amplitude of opening contact mm ≤ 2
Information for solid seal pole column
From the development of insulations on breakers,it can be divided into three generations:air, composite and solid insulation and so-called solid insulation means solid seal pole column,which might represent the great advancement of insulation on vacuum breakers.Since the epoxy can be used to replace the insulating and mechanical supports,the breakers therefore become compact and simple and are able to service under humid and dusty conditions.When the external insulations of miniature chambers in air condition fail to fulfill the requests of specifications,solid seal pole column are therefore introduced and now become one of the most applicable ways in the field of medium voltage breakers either at home or abroad.
- Solid seal pole column for vacuum circuit breaker EEP1-12/1250-31.5
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